I live out in San Bernardino and live next to a natural wash. It's a dried up river bed and I walk it every other day. I noticed the sand in this river bed looks close to what I want to use in one of my tanks. it's clean and i have used the river rocks and some of the wood in some of my tanks that I have from this river bed. Now would it be wise if I use thihs sand for a convit tank that I have? if anyone can help me with this please responed I sure could use the help or advise from you all.